For me the idea of sex has never been scary. I do get one emotion though when I find myself close. Intimidation. I find I can't help but think a dozen things a moment trying to figure out what to do, how to do it and what I can do to make my partner happy. The only time that goes away is when I am playing Dom and Sub with someone. I don't play often but when I do things come natural and fluid. It's strange experience for me.